The Model Regulations cover the classification of dangerous goods and their listing, the use, construction, testing and approval of packagings and portable tanks, and the consignment procedures (marking, labelling, placarding and documentation). They aim at ensuring a high level of safety by preventing accidents to persons and property and damage-the environment during transport and, providing at the same time, a uniform regulatory framework which can be applied worldwide for national or international transport by any mode. This seventeenth revised edition contains various new and revised provisions concerning chemicals under pressure, electric double layer capacitors, mercury contained in manufactured articles, dangerous goods used as a coolant or conditioner, flexible bulk containers, salvage pressure receptacles, lithium batteries, dangerous goods packed in limited quantities, dangerous goods packed in minute quantities and packing instructions.